Method for configuring frequency resource about component carrier for new radio and apparatuses thereof

ABSTRACT

Provided are a method of configuring resource block (RB) indexing information about a component carrier (CC) by a base station (BS). The method may include: configuring common RB indexing information about the CC; configuring one or more bandwidth parts (BWPs) based on the common RB indexing information; and transmitting the common RB indexing information and configuration information about the bandwidth parts to a terminal.

CROSS REFERENCE TO RELATED APPLICATION

This is a continuation application of U.S. Pat. Application No.17/182,159, filed Feb. 22, 2021 (currently pending), the disclosure ofwhich is incorporated herein by reference in its entirety. U.S. Pat.Application No. 17/182,159 is a continuation application of U.S. Pat.Application No. 15/985,862, filed May 22, 2018, now U.S. Pat. No.10,979,190, issued Apr. 13, 2021, the disclosure of which isincorporated herein by reference in its entirety. U.S. Pat. ApplicationNo. 15/985,862 claims the priority to and benefits of Korean Pat.Application Nos. 10-2017-0065379 filed May 26, 2017, 10-2017-0081411filed on Jun. 27, 2017, and 10-2018-0037938 filed Apr. 2, 2018, whichare hereby incorporated by reference in their entirety into thisapplication..

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present disclosure relates to a method of configuring a bandwidthpart for supporting a wider bandwidth operation in a next-generation/5Gradio access network (hereinafter, referred to as a new radio (NR)) anda method of indexing a resource block (RB).

2. Description of the Prior Art

Recently, the 3^(rd) generation partnership project (3GPP) has approvedthe “Study on New Radio Access Technology”, which is a study item forresearch on next-generation/5G radio access technology. On the basis ofthe Study on New Radio Access Technology, Radio Access Network WorkingGroup 1 (RAN WG1) has been discussing frame structures, channel codingand modulation, waveforms, and multiple access methods for a new radio(NR). NR is required to be designed not only to provide an improved datatransmission rate as compared with that of long term evolution(LTE)/LTE-Advanced, but also to satisfy various requirements in detailedand specific usage scenarios.

An enhanced mobile broadband (eMBB), massive machine-type communication(mMTC), and ultra reliable and low latency communication (URLLC) areproposed as typical usage scenarios for the NR. In order to meet therequirements of the individual scenarios, it is required to designflexible frame structures when compared to those of LTE/LTE-Advanced.

Particularly, in order to support terminals having different bandwidthcapabilities in one or more NR component carriers (CCs), a bandwidthoperation needs to be flexibly supported by configuring one or morebandwidth parts and setting and activating the bandwidth partsdifferently according to the terminals. Further, to this end, there is aneed to develop a method of setting and indexing frequency resources ofthe NR CCs.

SUMMARY OF THE INVENTION

Aspects of the present disclosure are directed to providing a method ofconfiguring bandwidth parts for setting frequency resources of new radiocomponent carriers (NR CCs) and a method of indexing a resource block(RB).

According to an aspect of the present disclosure, there is provided amethod of configuring, by a base station (BS), RB indexing informationabout a CC, the method including: configuring common RB indexinginformation about the CC; configuring one or more bandwidth parts (BWPs)based on the common RB indexing information; and transmitting the commonRB indexing information and configuration information about thebandwidth parts to a terminal.

According to another aspect of the present disclosure, there is provideda method of receiving, by a terminal, a radio channel or a radio signalbased on RB indexing with regard to a CC, the method including:receiving common RB indexing information about the CC and configurationinformation about bandwidth parts from a BS; and receiving a radiochannel or a radio signal from the BS based on the common RB indexinginformation and the configuration information about the bandwidth parts.

According to still another aspect of the present disclosure, there isprovided a base station (BS), which configures RB indexing informationwith regard to a CC, the BS including: a controller which configurescommon RB indexing information about the CC and configures one or moreBWPs based on the common RB indexing information; and a transmitterconfigured to transmit the common RB indexing information andconfiguration information about the bandwidth parts to a terminal.

According to yet another aspect of the present disclosure, there isprovided a terminal which receives a radio channel or a radio signalbased on RB indexing with regard to a CC, the terminal including areceiver configured to receive common RB indexing information about theCC and configuration information about bandwidth parts from a basestation (BS), and receive a radio channel or a radio signal from the BSbased on the common RB indexing information and the configurationinformation about the bandwidth parts.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features and advantages of the presentdisclosure will be more apparent from the following detailed descriptiontaken in conjunction with the accompanying drawings, in which:

FIG. 1 illustrates arrangements of orthogonal frequency divisionmultiple (OFDM) symbols when subcarrier spacings, which are differentfrom each other, are used according to embodiments;

FIG. 2 illustrates a conceptual example of a bandwidth part according toan embodiment;

FIG. 3 illustrates a conceptual example of setting a user equipment(UE)-specific bandwidth part according to an embodiment;

FIG. 4 illustrates a method of indicating a frequency gap according toan embodiment;

FIG. 5 illustrates a method of additionally defining an frequency offsetaccording to an embodiment;

FIG. 6 illustrates a method of indicating a starting physical resourceblock (PRB) index for setting the bandwidth part according to anembodiment;

FIG. 7 illustrates a method of indicating a PRB offset for transmittingand receiving a reference signal (RS) according to an embodiment;

FIG. 8 illustrates a method of configuring resource block (RB) indexinginformation about component carriers (CCs) in a base station (BS)according to an embodiment;

FIG. 9 illustrates a method of receiving a radio channel or a radiosignal based on the RB indexing about the CCs in a terminal according toan embodiment;

FIG. 10 illustrates a BS according to embodiments; and

FIG. 11 illustrates a terminal according to embodiments.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

Hereinafter, embodiments of the present disclosure will be described indetail with reference to the accompanying drawings. In adding referencenumerals to elements in each drawing, the same elements may bedesignated by the same reference numerals although the same elements areshown in different drawings. Further, in the following description ofthe present disclosure, detailed descriptions of functions andconfigurations related to the known structure may be omitted when it isdetermined that the descriptions may obscure the gist of the presentdisclosure.

In the present disclosure, a wireless communication system refers to asystem for providing various communication services such as a voiceservice, a packet data service, etc. The wireless communication systemmay include a user equipment (UE) and a base station (BS).

The UE may be a comprehensive concept that indicates a terminal for usein wireless communication, including a UE used for wideband codedivision multiple access (WCDMA), long term evolution (LTE), high speedpacket access (HSPA), international mobile telecommunications (IMT)-2020(5G or new radio), or the like, and a mobile station (MS), a userterminal (UT), a subscriber station (SS), a wireless device, or the likeused for a global system for mobile communications (GSM).

The BS or a cell generally refers to a station where communication witha UE is performed. The BS or the cell inclusively means all of variouscoverage areas such as a Node-B, an evolved Node-B (eNB), a gNode-B(gNB), a low power node (LPN), a sector, a site, various types ofantennas, a base transceiver system (BTS), an access point, a point(e.g., a transmitting point, a receiving point, or a transceivingpoint), a relay node, a megacell, a macrocell, a microcell, a picocell,a femtocell, a remote radio head (RRH), a radio unit (RU), and a smallcell.

Each of the above-described various cells has a BS that controls acorresponding cell, and thus, the BS may be construed in two ways. 1)The BS may be a device that provides the megacell, the macrocell, themicrocell, the picocell, the femtocell, and the small cell inassociation with a wireless area, or 2) the BS may indicate the wirelessarea itself. In item 1), the BS may be any device that interacts withanother device to enable the device that provides a predeterminedwireless area to be controlled by an identical entity or tocooperatively configure the wireless area. Based on a configuration typeof the wireless area, the BS may be a point, a transmission/receptionpoint, a transmission point, a reception point, or the like. In item 2),the BS may be the wireless area itself that receives or transmits asignal from a perspective of the terminal or a neighboring BS.

In the present disclosure, the cell may refer to the coverage of asignal transmitted from the transmission/reception point, a componentcarrier having the coverage of the signal transmitted from thetransmission/reception point (transmission point ortransmission/reception point), or the transmission/reception pointitself.

In the present disclosure, the user equipment and the BS are used as two(uplink and downlink) inclusive transceiving subjects to embody thetechnology and technical concepts described in the specifications,however, may not be limited to a specific term or word.

Here, a term uplink (UL) refers to a scheme for the UE to transceivedata to the BS, and a term downlink (DL) refers to a scheme for the BSto transceive data to the UE.

UL transmission and DL transmission may be performed using i) a timedivision duplex (TDD) scheme that performs transmission based ondifferent times, ii) a frequency division duplex (FDD) scheme thatperforms transmission based on different frequencies, or iii) a mixedscheme of the TDD and FDD schemes.

Further, in the wireless communication system, a standard may bedeveloped by forming a UL and a DL based on a single carrier or a pairof carriers.

The UL and the DL may transmit control information through a controlchannel, such as a physical DL control channel (PDCCH), physical ULcontrol channel (PUCCH), and the like. The UL and the DL may beconfigured as a data channel, such as a physical DL shared channel(PDSCH), physical UL shared channel (PUSCH), and the like, to transmitdata.

The DL may refer to communication or a communication path from amulti-transmission/reception point to the terminal, and the UL may referto communication or the communication path from the terminal to amulti-transmission/reception point. In the DL, a transmitter may be apart of multiple transmission/reception points, and a receiver may be apart of the terminal. In the UL, a transmitter may be a part of theterminal, and a receiver may be a part of multipletransmission/reception points.

Hereinafter, a situation in which signals are transmitted and receivedthrough a channel such as the PUCCH, the PUSCH, the PDCCH, or the PDSCHwill be expressed as the transmission and reception of the PUCCH, thePUSCH, the PDCCH, or the PDSCH.

Meanwhile, higher layer signaling includes a radio resource control(RRC) signaling that transmits RRC information including an RRCparameter.

The BS performs DL transmission to the terminals. The BS may transmit aphysical DL control channel for transmitting DL control information suchas scheduling required to receive a DL data channel, which is a mainphysical channel for unicast transmission, and scheduling approvalinformation for transmission on a UL data channel. Hereinafter,transmission and reception of a signal through each channel will bedescribed as transmission and reception of a corresponding channel.

Varied multiple access schemes may be unrestrictedly applied to thewireless communication system. Various multiple access schemes, such astime division multiple access (TDMA), frequency division multiple access(FDMA), CDMA, orthogonal frequency division multiple access (OFDMA),non-orthogonal multiple access (NOMA), OFDM-TDMA, OFDM-FDMA, OFDM-CDMA,and the like may be used. Here, NOMA includes sparse code multipleaccess (SCMA), low cost spreading (LDS), and the like.

Embodiments of the present disclosure may be applicable to resourceallocation in an asynchronous wireless communication scheme that evolvesinto LTE/LTE-advanced and IMT-2020 through GSM, WCDMA, and HSPA, and maybe applicable to resource allocation in a synchronous wirelesscommunication scheme that evolves into CDMA, CDMA-2000, and UMB.

In the present disclosure, an machine type communication (MTC) terminalrefers to a terminal that is low cost (or low complexity), a terminalthat supports coverage enhancement, or the like. Alternatively, in thepresent disclosure, the MTC terminal refers to a terminal that isdefined in a predetermined category for maintaining low costs (or lowcomplexity) and/or coverage enhancement.

In other words, in the present specifications, the MTC terminal mayrefer to a newly defined 3GPP Release-13 low cost (or low complexity) UEcategory/type which executes LTE-based MTC related operations.Alternatively, in the present specifications, the MTC terminal may referto a UE category/type that is defined in or before 3GPP Release-12 thatsupports the enhanced coverage in comparison with the existing LTEcoverage, or supports low power consumption, or may refer to a newlydefined Release-13 low cost(or low complexity) UE category/type.Alternatively, the MTC terminal may refer to a further Enhanced MTCterminal defined in Release-14.

In the present disclosure, a narrowband Internet of Things (NB-IoT)terminal refers to a terminal supporting radio access for cellular IoT.NB-IoT technology is aimed at indoor coverage improvement, support forlarge-scale low-speed terminals, low latency sensitivity, very lowterminal costs, low power consumption, and optimized networkarchitecture.

An eMBB, mMTC, and URLLC are proposed as typical usage scenarios for NRwhich have been under discussion in the 3GPP in recent years.

In the present disclosure, a frequency, a frame, a subframe, a resource,a resource block, a region, a band, a sub-band, a control channel, adata channel, a synchronization signal, various reference signals,various signals, and various messages associated with NR may beinterpreted as meanings used in the past or present or as variousmeanings to be used in the future.

NR

Recently, the 3GPP has approved the “Study on New Radio AccessTechnology”, which is a study item for research on next-generation/5Gradio access technology. On the basis of the study item, the 3GPP havestarted to have discussions about frame structure, channel coding &modulation, waveform, multiple access scheme, etc..

NR is required to be designed not only to provide a data transmissionrate improved as compared with that of LTE/LTE-Advanced, but also tosatisfy various requirements in detailed and specific usage scenarios.In particular, an eMBB, mMTC, and URLLC have been given asrepresentative usage scenarios of the NR, and it has been required todesign flexible frame structures as compared with those forLTE/LTE-Advanced in order to satisfy the requirements of each individualscenario.

Specifically, the eMBB, mMTC and URLLC have been taken into account forthe representative usage scenarios of the NR being discussed in the3GPP. Since the usage scenarios are different from one another in termsof requirements for data rates, latency, coverage, etc., necessity for amethod of efficiently multiplexing radio resource units based ondifferent kinds of numerology (e.g., a subcarrier spacing (SCS), asubframe, a transmission time interval (TTI), etc.) has been proposed asa method of efficiently satisfying requirements according to usagescenarios through a frequency band of a certain NR system.

To this end, there have been discussions about a method of multiplexingand supporting numerology having different values of SCS based on TDM,FDM or TDM/FDM through one NR carrier, and a method of supporting one ormore time units in forming scheduling units in a time domain. In thisregard, the NR has defined a subframe as one kind of time domainstructure, and a single subframe duration configured with 14 OFDMsymbols of 15 kHz SCS-based normal CP overhead like the LTE as referencenumerology to define the corresponding subframe duration. Therefore, thesubframe in the NR has a time duration of 1 ms. However, unlike the LTE,the subframe of the NR may have a slot and a mini-slot defined as anactual UL/DL data scheduling-based time unit, which is an absolutereference time duration. In this case, the number of OFDM symbols forforming the corresponding slot, i.e., a value of y, has been defined asy = 14 regardless of the numerology.

Therefore, a certain slot may include 14 symbols. In accordance withtransmission directions for the corresponding slot, any of the symbolsmay be used for DL transmission or UL transmission, or the symbols maybe used in the form of a DL portion + a gap + a UL portion.

Further, a mini-slot configured with fewer symbols than those of thecorresponding slot may be defined in certain numerology (or SCS), and ashort time domain scheduling interval for transmitting and receivingUL/DL data may be set based on the mini-slot. Also, a long time domainscheduling interval for transmitting and receiving UL/DL data may beconfigured by slot aggregation.

Particularly, in the case of transmitting and receiving latency criticaldata like the URLLC, when the scheduling is performed in units of slotsbased on 0.5 ms (7 symbols) or 1 ms (14 symbols) defined in a framestructure based on the numerology having a small SCS value like 15 kHz,latency requirements may be difficult to satisfy with the scheduling. Tothis end, the mini-slot having fewer OFDM symbols than those of thecorresponding slot is defined, and thus the scheduling for the latencycritical data like the URLLC is performed based on the mini-slot.

Further, as described above, there has been discussions about a methodof scheduling data in accordance with latency requirements based on thelength of the slot (or mini-slot) defined in each individual numerologyby using the TDM or FDM method to multiplex and support the numerologyhaving different SCS values within one NR carrier. For example, as shownin FIG. 1 , the length of a symbol for 60 kHz SCS is shortened by afourth of that for 15 kHz SCS, and thus a 60 kHz-based slot is shortenedto have a length of about 0.125 ms as compared with a 15 kHz-based slothaving a length of 0.5 ms under the same condition that one slot isconfigured with seven OFDM symbols.

As described above, a method of satisfying each requirement of URLLC andeMBB has been under discussion by defining different SCS or differentTTI length in the NR.

Wider Bandwidth Operations

The typical LTE system supports a scalable bandwidth operation withregard to a LTE component carrier (CC). That is, in accordance withfrequency deployment scenarios, a LTE business operator configures abandwidth within a range of the minimum of 1.4 MHz to the maximum of 20MHz in terms of configuring one LTE CC, and therefore a normal LTEterminal supports a transceiving bandwidth capability of 20 MHz withrespect to one LTE CC.

On the other hand, the NR has been designed to support NR terminalshaving different transceiving bandwidth capabilities with respect to oneNR CC, and thus the NR is required to configure one or more bandwidthparts divided into many bandwidths with respect to a certain NR CC andset and activate the bandwidth parts differently according to theterminals to thereby support a flexible wider bandwidth operation asshown in FIG. 2 .

Like this, it may be defined that a NR CC is divided into one or morebandwidth parts, the one or more bandwidth parts are configured for eachindividual terminal, and a UL/DL radio signal and channel for a terminalis transceived by activating at least one bandwidth part among one ormore bandwidth parts configured for the corresponding terminal.

Further, when a plurality of numerologies (e.g., SCS, CP length, etc.)are supported in a NR CC, transceiving numerologies may be setdifferently according to the bandwidth parts.

As described above, a NR CC may be configured with one or more bandwidthparts. In terms of configuring the bandwidth parts in a NR CC, thecorresponding bandwidth parts may be based on a UE-specific orcell-specific configuration. In other words, the bandwidth parts may beconfigured differently according to the terminals as shown in FIG. 3 ,or the bandwidth parts may be configured equally for all the terminalswith respect to a NR CC. However, FIG. 3 merely shows an example, andthe specific bandwidth of the NR CC and the bandwidth for each bandwidthpart are not to be construed as limiting the present disclosure.

When the bandwidth parts are configured for a certain NR CC, UL/DLbandwidth parts for communication between the terminal and the BS may beconfigured by activation of DL bandwidth parts for PDSCH/PUSCHtransmission and reception and activation of UL bandwidth parts forPUCCH/PUSCH transmission and reception between the BS and the terminalamong the configured bandwidth parts.

In this embodiment, a frequency granularity defining method and an RBindexing method will be proposed for configuring bandwidth parts in acertain NR CC.

The embodiments set forth herein may even be applied to a terminal, aBS, and a core network entity (or mobility management entity (MME) whichemploys all mobile communication technologies). For example, theembodiments may be applied to a next-generation mobile communication (5Gmobile communication or New-RAT) terminal, a BS and a core networkentity (access and mobility function (AMF)) as well as a mobilecommunication terminal employing the LTE technology. For convenience ofdescription, the BS may refer to an eNB of LTE/E-UTRAN, or the BS mayrefer to a gNB and a BS (i.e., a central unit (CU), a distributed unit(DU), or the CU and the DU may be provided as a logical entity) in the5G radio network where the CU and the DU are separated.

Further, the numerology described in this specification refers to anumerical characteristic and a numerical value about datatransmission/reception, and the numerology may be determined by a valueof subcarrier spacing (hereinafter, referred to as ‘SCS’). Therefore,the numerology being different may indicate that the SCS of determiningthe numerology is different.

In addition, a slot length in this specification may be represented bythe number of OFDM symbols forming a slot or by a time occupied by theslot. For example, when the numerology based on the SCS of 15 kHz isused, the length of one slot may be represented by 14 OFDM symbols or by1 ms.

Below, a method of transmitting and receiving data based on RB indexingfor a CC will be described in more detail through various embodiments.

The embodiments set forth herein may be applied individually or in acombination thereof.

Embodiment #1. Frequency Location Indication for Bandwidth PartConfiguration

As a method of indicating a frequency location according to bandwidthparts to configure the bandwidth parts in a NR CC, a method ofindicating a frequency gap (or a frequency offset) from a referencefrequency point may be proposed according to this embodiment.

Specifically, as a method of defining a reference frequency point in aNR CC, the reference frequency point may be defined based on a centrefrequency of the corresponding NR CC. As another method of defining areference frequency point in a certain NR CC, the reference frequencypoint may be defined based on one of an upper edge and a lower edge of abandwidth for transmitting an SS block. Alternatively, cell-specific orUE-group common reference bandwidth parts (or default bandwidth parts)may be defined for a NR CC, and a reference frequency point may bedefined as the centre frequency or the upper or lower edge of thereference bandwidth parts.

In this case, the corresponding cell-specific or the UE-group commonreference bandwidth parts may be defined by the minimum UE bandwidthdefined in the NR including the SS block, or the correspondingcell-specific or the UE-group common reference bandwidth parts may bedefined as the bandwidth parts configured for transmitting remainingminimum system information (RMSI).

Information about a reference frequency point and a frequency gap forsetting certain bandwidth parts may include information about afrequency gap between the corresponding reference frequency point andthe centre frequency of the bandwidth part.

For example, among the preceding embodiments for defining the referencefrequency point, the corresponding reference frequency point may bedefined as the centre frequency of the NR CC. In this case, informationfor configuring a certain bandwidth part may include information about afrequency gap between the centre frequency of the corresponding NR CCand the centre frequency of the configured bandwidth part.Alternatively, the corresponding reference frequency point may bedefined as the centre frequency of the cell-specific or UE-group commonreference bandwidth part. In this case, information for configuring abandwidth part may include information about a frequency gap between thecentre frequency of the cell-specific or UE-group common referencebandwidth part and the centre frequency of the configured bandwidthpart.

Alternatively, the foregoing information about a frequency gap mayinclude information about a frequency gap between the upper or loweredge of the SS block and the upper or lower edge of the correspondingbandwidth part. Specifically, when a bandwidth part in a frequency bandwhich is higher than that of an SS block in a NR CC is defined, thecorresponding reference frequency point for setting the frequency gap isdefined as the upper edge of the SS block, and the correspondinginformation for configuring the bandwidth parts may be defined toinclude information about a frequency gap between the upper edge of thecorresponding SS block and the lower edge of the bandwidth part toindicate a frequency location. On the other hand, when a bandwidth partin a frequency band which is lower than that of an SS block in a NR CCis defined, the corresponding reference frequency point for setting thefrequency gap is defined as the lower edge of the SS block, and thecorresponding information for configuring the bandwidth parts may bedefined to include information about a frequency gap between the loweredge of the corresponding SS block and the upper edge of the bandwidthpart to indicate a frequency location.

Alternatively, the foregoing information about a frequency gap mayinclude information about a frequency gap between the upper or loweredge of the foregoing cell-specific or UE-group common referencebandwidth part and the lower or upper edge of the correspondingbandwidth part. Specifically, when a bandwidth part in a frequency bandwhich is higher than a reference bandwidth part in a NR CC is defined,the corresponding reference frequency point for setting the frequencygap is defined as the upper edge of the reference bandwidth part, andthe corresponding information for configuring the bandwidth parts may bedefined to include information about a frequency gap between the upperedge of the corresponding reference bandwidth part and the lower edge ofthe bandwidth part to indicate a frequency location. On the other hand,when a bandwidth part in a frequency band which is lower than areference bandwidth part in a NR CC is defined, the correspondingreference frequency point for setting the frequency gap is defined asthe lower edge of the reference bandwidth part, and the correspondinginformation for configuring the bandwidth parts may be defined toinclude information about a frequency gap between the lower edge of thecorresponding reference bandwidth part and the upper edge of thebandwidth part to indicate a frequency location.

In the following FIG. 4 shows the method of indicating the frequency gapbetween the centre frequencies and the method of indicating the gapbetween the edges as described above to indicate the frequency locationof each bandwidth part.

When the gap between the centre frequencies is indicated as describedabove to indicate the frequency gap, it may be defined to indicateadditional frequency offset information from the centre frequency inaccordance with the bandwidths of the corresponding bandwidth part inorder to accurately set the frequency location. For example, when abandwidth part is configured with odd numbered PRBs, the centrefrequency of the bandwidth part set by the frequency gap indication maybe not exactly located at the center of the bandwidth part, as shown inFIG. 5 . In other words, when a bandwidth part is configured with 2N+1PRBs, a PRB boundary may be aligned with respect to the correspondingcentre frequency or may be misaligned (i.e., in a case that the centrefrequency penetrates the centre PRB of the bandwidth part) as shown inFIG. 5 . In the case of alignment, the bandwidth part may include anupper band configured with N+1 PRBs and a lower band configured with NPRBs or may include an upper band configured with N PRBs and a lowerband configured with N+1 PRBs with respect to the corresponding centrefrequency. Therefore, information about an additional frequency offsetcorresponding to {+half PRB, 0, -half PRB} may be defined to set andtransmited with respect to the centre frequency of the bandwidth partconfigured by the frequency gap indication. However, the additionalfrequency offset may be analyzed based on a PRB grid according tosetting values of the numerologies for the bandwidth parts and may beapplied even when the bandwidth part is configured with even-numberedPRBs as well as the odd-numbered PRBs.

In the case of additionally using the foregoing bandwidth edge for thefrequency gap indication, it may be defined that the frequency gap isindicated with information about whether the configured bandwidth partis set in the reference SS block or set in an upper frequency band or alower frequency band with respect to the reference bandwidth part. Thus,as shown in FIG. 4 , it may be defined that the frequency gap isindicated between the upper edge of the SS block (or the referencebandwidth part) and the lower edge of the configured bandwidth part whenthe bandwidth part is configured in the upper frequency band, and thefrequency gap is indicated between the lower edge of the SS block (orthe reference bandwidth part) and the upper edge of the configuredbandwidth part when the bandwidth part is configured in the lowerfrequency band.

Alternatively, as described in the foregoing embodiment with referenceto FIG. 4 , the frequency gap indication may be achieved with respect toa fixed frequency point without changing a combination between the edgeof the SS block (or the reference bandwidth part) used as a referencefrequency point for determining the frequency gap and the edge of theconfigured bandwidth part in accordance with whether a certain bandwidthpart is configured in a frequency band higher or lower than the SS blockor the reference bandwidth part. In other words, the frequency gapindication may be seted with respect to the upper edge of the SS block(or the reference bandwidth part) and the upper edge of the configuredbandwidth part, or may be seted with respect to the lower edge of the SSblock (or the reference bandwidth part) and the lower edge of theconfigured bandwidth part.

Embodiment #2. Frequency Granularity for Bandwidth Part Configuration

To configure a bandwidth part in a NR CC, bandwidth configurationinformation is needed in addition to the frequency locationconfiguration information of the bandwidth part according to theembodiment #1. In particular, there is a need for defining a frequencyunit, i.e., a frequency granularity for the foregoing frequency gapindication and bandwidth configuration of the bandwidth part.

Specifically, units of PRB grid may be given based on an SCS value setfor a bandwidth part as the frequency unit for the foregoing frequencygap indication and bandwidth configuration of the bandwidth part. Thatis, the foregoing frequency gap indication and bandwidth configurationof the bandwidth part may be performed in units of PRB sizecorresponding to the SCS configuration of the bandwidth part. In otherwords, when the SCS of 15 kHz is set with regard to a bandwidth partconfigured for a terminal, the foregoing frequency gap indication andbandwidth configuration of the bandwidth part may be performed in unitsof 15 kHz SCS-based PRB, and thus the information about the frequencygap indication or information about the bandwidth configuration of thebandwidth part may be defined to indicate the number of PRBscorresponding to the frequency gap or the bandwidth of the bandwidthpart.

As another method, the frequency configuration information for theforegoing frequency gap indication and bandwidth configuration of thebandwidth part may be set in units of PRB grid based on a default SCS ofthe NR CC (i.e., the SCS defined for transmitting a synchronizationsignal (SS) in the NR CC) regardless of the SCS configuration of thebandwidth part. In other words, the foregoing frequency gap indicationor the bandwidth configuration of the bandwidth part is performed inunits of PRB size corresponding to the default SCS configuration of theNR CC, and thus the frequency gap indication or the bandwidthconfiguration of the bandwidth part may be defined to be indicated withinformation about the number of PRBs for configuring the same.

As still another method of defining the frequency granularity, it may bedefined that the frequency gap indication is set in units of PRB gridbased on the default SCS of the NR CC, and the bandwidth of thebandwidth part is configured in units of PRB grid based on the SCSconfiguration of the corresponding bandwidth part. In this case, thefrequency gap indication and the bandwidth configuration of thebandwidth part are respectively performed in units of PRB grid based onthe default SCS and units of PRB grid based on the SCS configured forthe bandwidth part, and are each indicated in the form of thecorresponding numbers of PRBs.

As still another method of defining the frequency granularity, it may bedefined that the frequency configuration information for the foregoingfrequency gap indication and bandwidth configuration of the bandwidthpart is set based on absolute frequency band information. In otherwords, when a frequency gap and a frequency band for configuring abandwidth of a bandwidth part are respectively X MHz and Y MHz, it maybe defined that the values of X and Y are directly subjected tosignaling. In this case, it may be limited that candidate values to beset as the values of X and Y are restricted, and one of the candidatevalues is selected. For example, values of {N1, N2, N3, and N4} aredefined as candidate values for X and Y, and one of the candidate valuesis set and defined for the signaling. However, candidate values for thefrequency gap indication and candidate values for indicating thebandwidth of the bandwidth part may be different from each other.Further, embodiments of the present disclosure may be applied regardlessof a specific candidate value.

As still another method of defining the frequency granularity, theminimum frequency bandwidth is defined as units of setting a frequencyfor the frequency gap indication and the bandwidth configuration of thebandwidth part, and the frequency gapindication and the bandwidth thebandwidth part are set in units of the minimum frequency bandwidth. Forexample, the minimum frequency bandwidth may be defined as an SS blockcorresponding to a frequency range configured with the NR CC or atransmission bandwidth of a synchronization signal. Alternatively, theminimum frequency bandwidth may be defined as a value corresponding to atransceiving bandwidth of an NR terminal having the lowest capabilitydefined in the NR. When the minimum frequency bandwidth is defined likethis, each of the frequency gap configuration and the bandwidthconfiguration of the bandwidth part may be materialized in a multipleform of the minimum frequency bandwidth.

Embodiment #3. PRB Indexing

As described above, in the NR, for efficient multiplexing betweenterminals having different transceiving bandwidths within one NR CC, ithas been designed that one or more bandwidth parts are configured withregard to a NR CC so that the UL/DL transmission and reception may beenabled based on the corresponding bandwidth parts. In particular, thebandwidth parts may be differently configured according to the terminalswithin one NR CC. Further, it has been taken into account thatBS/terminal operations are defined to support a plurality of bandwidthparts within one NR CC through a carrier aggregation (CA) form.

Therefore, there is a need for defining a PRB indexing method in whichthe configuration of the bandwidth parts differ according to theterminals and different operation scenarios for configuring/aggregatingthe bandwidth parts are taken into account. The PRB indexing is not onlyneeded for indicating a frequency resource allocation for transceiving adata channel of each terminal but also used for sequence generation of acertain reference signal (RS) (e.g., DM RS, CSI-RS, etc.), and thus aPRB indexing method is required in this regard.

To this end, a unified PRB indexing method is proposed for PRB indexingwith regard to a certain NR CC regardless of the configuration ofbandwidth parts according to the terminals. Here, the unified PRBindexing may also be called common RB indexing or common resource blockindexing, and the terms are not to be construed as limiting embodimentsof the present disclosure.

The single PRB indexing may be used regardless of whether a NR CC isconfigured based on a single numerology or whether multiple numerologiesare subjected to multiplexing, and also regardless of how the bandwidthparts are configured according to the terminals.

Specifically, it may be defined that a NR CC is subjected to a PRBindexing rule in increasing order from the lowest frequency, regardlessof the configuration of the numerologies and the configuration of thebandwidth parts according to the terminals within the NR CC. Forexample, as shown in FIG. 6 , when a NR CC is configured with N PRBsbased on 15 kHz SCS and M PRBs based on 30 kHz SCS, which aremultiplexed in the form of FDM, the PRB indexing is defined in the NR CCin sequence from the lowest frequency band, i.e., from PRB #0 to PRB#(N + M - 1).

Alternatively, the above unified PRB indexing may be defined to besequentially performed from the reference frequency point described inthe Embodiment #1.

Like this, when the unified PRB indexing is applied in units of the NRCC, a method of deriving the PRB indexing for the bandwidth parts has tobe defined in the terminal at the configuration of the bandwidth parts.To this end, a method is proposed for indicating a starting PRB index ofthe bandwidth part, i.e., an index of the lowest PRB of the bandwidthpart to the terminal when a certain bandwidth part is configured or whena certain bandwidth part is activated. In other words, it may be definedthat the starting PRB index (e.g., the starting PRB offset value) of abandwidth part is indicated to a terminal through UE-specific orcell-specific higher layer signaling when the bandwidth part is set forthe certain terminal. Alternatively, it may be defined that the startingPRB index value of a bandwidth part to be activated through activationsignaling (e.g., MAC CE signaling, L1 control signaling, etc.) isincluded when the bandwidth part is activated for a certain terminal.

For example, as shown in FIG. 6 , in a case where a bandwidth part for aUE 1 is configured with 15 kHz PRBs and a bandwidth part for a UE 2 isconfigured with 30 kHz PRB s, it may be defined that the starting PRBindex is indicated corresponding to the bandwidth part when thebandwidth part is configured for each terminal in a NR BS/cell or whenthe bandwidth part is activated. In other words, the BS/cell mayindicate the starting PRB index, i.e., a value of K for the bandwidthpart to the UE1 and may indicate the starting PRB index, i.e., a valueof N for the bandwidth part to the UE2.

As another PRB indexing method for a bandwidth part, it may be definedthat independent PRB indexing according to the bandwidth parts isadditionally defined together with the PRB indexing method applied inthe bandwidth parts according to the unified PRB indexing method, andthe above two types of PRB indexing are divisionally applied accordingto use cases.

In other words, when a bandwidth part is configured with P PRBs, it maybe defined that specific PRB indexes are defined to the bandwidth partin increasing order from PRB #0 to PRB #(P-1) in a frequency domain withregard to P PRBs of the bandwidth part together with the above unifiedPRB indexing method, and one of the two types of PRB index is appliedaccording to the use cases of the PRB index.

According to one embodiment, it may be defined that the unified PRBindex is used for the sequence generation of the RS, and a local PRBindex is applied when a PRB allocation information range is configuredand analyzed in a DL assignment or UL grant DCI including schedulingcontrol information about the PDSCH or PUSCH. In this case, a method ofindexing a local PRB refers to a method of indexing a PRB correspondingto a terminal-specific bandwidth part, and it may also be calledUE-specific PRB indexing. The terms are not to be construed as limitingembodiments of the present disclosure.

According to one embodiment, it may be defined that the PRB indexing isindependently performed for each of the bandwidth parts. That is, asdescribed above, when a bandwidth part is configured with P PRBs, thePRB indexes specific to the bandwidth part are defined in increasingorder from PRB #0 to PRB #(P-1) in the frequency domain with regard tocertain P PRBs of the bandwidth part together with the unified PRBindexing method. However, when the PRB index-based sequence generationis applied for generating and transceiving all the UL/DL RSs, which maybe defined in the NR, such as a CSI-RS, a DM RS, a PT-RS or a TRS, aSRS, etc., or when an RS structure (e.g., in which an RS is generated tohave a certain sequence length, and a mapping portion of the wholesequence is varied depending on a PRB index or a PRB location) to beexpected to be transmitted and received between the terminal and the BSis determined based on the PRB index, it may be defined that theterminal or the BS indicates an offset value of the PRB for transceivingthe RS with respect to the PRB index of the bandwidth part, i.e., avalue corresponding to a misalignment gap between a sequence boundary ofeach RS and the PRB #0 of the bandwidth part.

In other words, in a case where an RS is defined based on a length whichis L and mapped in units of x PRBs in the frequency domain as shownbelow in FIG. 7 , information about the PRB offset value with regard tothe RS in the bandwidth part (or about the misalignment gap) isindicated through UE-specific or cell-specific higher layer signaling,MAC CE signaling, or L1 control signaling in a BS/network when a certainbandwidth part is configured and activated or when information abouttransmission and reception of the RS signal is transmitted.

In addition, the foregoing method of indexing the PRB according to thebandwidth parts or indication method related to the transmission andreception of the RS may be equally applied to a terminal in which aCA-based operation is applied to a plurality of bandwidth parts in acertain NR CC.

FIG. 8 illustrates a method of configuring RB indexing information aboutCCs in a BS according to an embodiment.

Referring to FIG. 8 , the BS may configure common RB indexinginformation about the CC (S800). Here, the CC may refer to a narrowband(NB) CC or a wideband (WB) CC and may refer to one or more CCs formingCA. All the terminals using the same CCs share the same common RBindexing information.

As described above in Embodiment #3, such common RB indexing informationmay be applied regardless of whether the CC is based on a singlenumerology or multiple numerologies. In other words, the physical RBsindicated based on the common RB indexing information may be differentin frequency bandwidth from one another.

The common RB indexing information may be employed in scheduling agroup-common PDSCH, generating a sequence of the RS, or configuring thebandwidth part.

Further, the BS may configure one or more bandwidth parts (BWPs) basedon the common RB indexing information configured in operation S800(S810). In this case, configuration information about each of thebandwidth parts may include a starting RB index, i.e., a start point ofthe bandwidth part based on the common RB indexing information. Such astarting PRB index may be represented in units of RB index based on thecommon RB indexing.

Further, the configuration information about each of the bandwidth partsmay additionally include information about the starting RB index basedon the common RB indexing information and information about the size ofthe bandwidth part. The configuration information about each of thebandwidth parts may include a PRB index for indicating the end of thebandwidth part instead of the size of the bandwidth part. The PRB indexmay also be configured based on the common RB indexing information.

Then, the BS may transmit the common RB indexing information and theconfiguration information about the bandwidth parts respectivelyconfigured in operations S800 and S810 to the terminal (S820). In thiscase, for example, the BS may transmit the common RB indexinginformation and the configuration information about the bandwidth partsto the terminal through the higher layer signaling (e.g., RRCsignaling).

The terminal receives the common RB indexing information and theconfiguration information about the bandwidth parts and uses onebandwidth part activated among one or more (up to four) bandwidth partsconfigured for the terminal in transmitting and receiving a UL/DL radiosignal and a radio channel. In this case, the terminal may receiveinformation about what bandwidth part is activated through a DCI.

In this case, the BS may additionally configure UE-specific PRB indexinginformation based on each of the bandwidth parts configured in operationS810. For instance, the PRB indexing information may be additionallyconfigured according to the size of the bandwidth part from zero withrespect to the bandwidth part i configured for a terminal based on thecommon RB indexing information. In other words, UE-specific PRB indexinginformation may be additionally configured from zero (i.e., a bandwidthpart size - 1) with respect to the bandwidth part i according toinformation about the size of the bandwidth part and the starting RBindex information indicated based on the common RB indexing informationto configure the bandwidth parts.

Further, each terminal may receive a radio channel scheduled based onthe UE-specific PRB indexing information corresponding to each bandwidthpart used by itself from the BS. For example, the UE-specific PDSCH maybe scheduled based on the UE-specific PRB indexing information, andindex information about the scheduled UE-specific PDSCH may be indicatedthrough the DCI.

FIG. 9 illustrates a method of receiving a radio channel or a radiosignal based on the RB indexing about the CCs in a terminal according toan embodiment.

Referring to FIG. 9 , the terminal may receive common RB indexinginformation about the CC and configuration information about a bandwidthpart from a BS (S900).

In this case, as described above in FIG. 8 , the CC may refer to a NB CCor a WB CC and may refer to one or more CCs forming CA. Further, asdescribed above in Embodiment #3, the common RB indexing information maybe applied regardless of whether the CC is based on a single numerologyor multiple numerologies.

The common RB indexing information may be, for example, employed inscheduling a group-common PDSCH among radio channels, generating asequence of the RS in a radio signal, or configuring the bandwidth part.

In this case, configuration information about each of the bandwidthparts may include a starting RB index, i.e., a start point of thebandwidth part based on the common RB indexing information. Such astarting RB index may be represented in units of PRB index based on thecommon RB indexing.

Further, the configuration information about each of the bandwidth partsmay additionally include information about the starting RB index basedon the common RB indexing information and information about the size ofthe bandwidth part. The configuration information about each of thebandwidth parts may include a PRB index for indicating the end of thebandwidth part instead of the size of the bandwidth part. The PRB indexmay also be configured based on the common RB indexing information.

Then, the terminal may receive a radio channel or a radio signal fromthe BS based on the common RB indexing information and the configurationinformation about the bandwidth parts received in operation S900 (S910).

The terminal receives the common RB indexing information and theconfiguration information about the bandwidth parts and uses onebandwidth part activated at every specific time interval among one ormore (up to four) bandwidth parts configured for the terminal intransmitting and receiving a UL/DL radio signal and a radio channel(e.g., PDSCH).

In this case, the terminal may additionally receive the UE-specific PRBindexing information based on each of the bandwidth parts. For instance,the PRB indexing information may be additionally configured according tothe size of the bandwidth part from zero with respect to the bandwidthpart i configured for a terminal based on the common RB indexinginformation. In other words, UE-specific PRB indexing information may beadditionally configured from zero (i.e., a bandwidth part size - 1) withrespect to the bandwidth part i according to information about the sizeof the bandwidth part and the starting RB index information indicatedbased on the common RB indexing information to configure the bandwidthparts.

Further, the BS may transmit a radio channel scheculed based on theUE-specific PRB indexing information corresponding to each bandwidthpart used by itself. For example, the UE-specific PDSCH may be scheduledbased on the UE-specific PRB indexing information, and index informationabout the scheduled UE-specific PDSCH may be indicated through the DCI.

FIG. 10 illlustrates a BS according to embodiments.

Referring to FIG. 10 , a BS 1000 includes a controller 1010, atransmitter 1020, and a receiver 1030.

The controller 1010 may configure common RB indexing information aboutthe CC and one or more bandwidth parts based on the common RB indexinginformation. Here, the CC may refer to a NB CC or a WB CC and may referto one or more CCs forming CA. All the terminals using the same CCsshare the same common RB indexing information.

As described above in Embodiment #3, such common RB indexing informationmay be applied regardless of whether the CC is based on a singlenumerology or multiple numerologies. In other words, the physical RBsindicated based on the common RB indexing information may be differentfrom one another in frequency bandwidth.

The common RB indexing information may be employed in scheduling agroup-common PDSCH, generating a sequence of the RS, or configuring thebandwidth part.

In this case, configuration information about each of the bandwidthparts may include a starting RB index, i.e., a start point of thebandwidth part based on the common RB indexing information.

Further, the configuration information about each of the bandwidth partsmay additionally include information about the starting RB index basedon the common RB indexing information and information about the size ofthe bandwidth part. The configuration information about each of thebandwidth parts may include a PRB index for indicating the end of thebandwidth part instead of the size of the bandwidth part. The PRB indexmay also be configured based on the foregoing common RB indexinginformation.

In addition, the BS 1000 may configure UE-specific PRB indexinginformation based on each of the bandwidth parts. For instance, the PRBindexing information may be additionally configured according to thesize of the bandwidth part from zero with respect to the bandwidth parti configured for a terminal based on the common RB indexing information.In other words, UE-specific PRB indexing information may be additionallyconfigured from zero (i.e., a bandwidth part size - 1) with respect tothe bandwidth part i according to information about the size of thebandwidth part and the starting RB index information indicated based onthe common RB indexing information to configure the bandwidth parts.

The transmitter 1020 and the receiver 1030 are used in transmitting andreceiving a signal, a message, or data to and from the terminal 1100according to the present disclosure.

Specifically, the transmitter 1020 may transmit the common RB indexinginformation and the configuration information about the bandwidth partsto the terminal.

In this case, for example, the BS 1000 may transmit the common RBindexing information and the configuration information about thebandwidth parts to the terminal 1100 through the higher layer signaling(e.g., RRC signaling).

The terminal 1100 receives the common RB indexing information and theconfiguration information about the bandwidth parts and uses onebandwidth part activated at every specific time interval among one ormore (up to four) bandwidth parts configured for the terminal intransmitting and receiving a UL/DL radio signal and a radio channel.

Further, the transmitter 1020 may additionally transmit the UE-specificPRB indexing information based on the bandwidth parts to the terminal.Then, the terminal receives the UE-specific PRB indexing information andis capable of receiving a radio channel scheduled based on theUE-specific PRB indexing information corresponding to each bandwidthpart used by itself from the BS 1000. For example, the UE-specific PDSCHmay be scheduled based on the UE-specific PRB indexing information, andindex information about the scheduled UE-specific PDSCH may be indicatedthrough the DCI.

FIG. 11 illustrates a terminal according to embodiments.

Referring to FIG. 11 , a terminal 1100 includes a receiver 1110, acontroller 1120, and a transmitter 1130.

The receiver 1110 receives DL control information, data, and a messagefrom the BS 1000 through a corresponding channel. Specifically, thereceiver 1110 may receive common RB indexing information about the CCand configuration information about a bandwidth part from the BS 1000and may receive a radio channel or a radio signal based on the common RBindexing information and the configuration information about thebandwidth part.

In this case, as described above, the CC may refer to a NB CC or a WB CCand may refer to one or more CCs forming CA. Further, as described abovein Embodiment #3, the common RB indexing information may be appliedregardless of whether the CC is based on a single numerology or multiplenumerologies.

In this case, configuration information about each of the bandwidthparts may include a starting RB index, i.e., a start point of thebandwidth part based on the common RB indexing information.

The common RB indexing information may be, for example, employed inscheduling a group-common PDSCH among radio channels, generating asequence of the RS in a radio signal, or configuring the bandwidth part.

Further, the configuration information about each of the bandwidth partsmay additionally include information about the starting RB index basedon the common RB indexing information and information about the size ofthe bandwidth part. The configuration information about each of thebandwidth parts may include a PRB index for indicating the end of thebandwidth part instead of the size of the bandwidth part. The PRB indexmay also be configured based on the foregoing common RB indexinginformation.

The terminal 1100 receives the common RB indexing information and theconfiguration information about the bandwidth parts and uses onebandwidth part activated at every specific time interval among one ormore (up to four) bandwidth parts configured for the terminal intransmitting and receiving a UL/DL radio signal and a radio channel(e.g., PDSCH).

In this case, the terminal 1100 may additionally receive the UE-specificPRB indexing information based on each of the bandwidth parts. Forinstance, the PRB indexing information may be additionally configuredaccording to the size of the bandwidth part from zero with respect tothe bandwidth part i configured for a certain terminal based on thecommon RB indexing information. In other words, UE-specific PRB indexinginformation may be additionally configured from zero (i.e., a bandwidthpart size - 1) with respect to the bandwidth part i according toinformation about the size of the bandwidth part and the starting RBindex information indicated based on the common RB indexing informationto configure the bandwidth parts.

Further, the BS 1000 may transmit a radio channel scheculed scheduledbased on the UE-specific PRB indexing information corresponding to eachbandwidth part used by itself. For example, the UE-specific PDSCH may bescheduled based on the UE-specific PRB indexing information, and indexinformation about the scheduled UE-specific PDSCH may be indicatedthrough the DCI.

The controller 1120 may control general operations when the terminalreceives a radio channel or a radio signal based on PRB indexing withregard to a CC.

According to the present embodiments, there are provided a method ofconfiguring bandwidth parts for setting frequency resources of NR CCsand a method of indexing a RB.

Standard details or standard documents described in the aboveembodiments are omitted for simplicity of description of thespecification and constitute a part of the present specification.Therefore, when a part of the contents of the standard details and thestandard documents is added to the present specifications or isdisclosed in the claims, it should be construed as falling within thescope of the present disclosure.

The above embodiments of the present disclosure have been described onlyfor illustrative purposes, and those skilled in the art will appreciatethat various modifications and changes may be made thereto withoutdeparting from the scope and spirit of the present disclosure.Therefore, the embodiments of the present disclosure are not intended tolimit, but are intended to illustrate the technical idea of the presentdisclosure, and the scope of the technical idea of the presentdisclosure is not to be limited by the embodiments. The scope of thepresent disclosure shall be construed on the basis of the accompanyingclaims in such a manner that all of the technical ideas included withinthe scope equivalent to the claims belong to the present disclosure.

Moreover, the terms “system,” “processor,” “controller,” “component,”“module,” “interface,”, “model,” “unit” or the like are generallyintended to refer to a computer-related entity, either hardware, acombination of hardware and software, software, or software inexecution. For example, a component may be, but is not limited to being,a process running on a processor, a processor, a controller, a controlprocessor, an object, an executable, a thread of execution, a program,and/or a computer. By way of illustration, both an application runningon a controller or processor and the controller or processor can be acomponent. One or more components may reside within a process and/orthread of execution and a component may be localized on one computerand/or distributed between two or more computers.

What is claimed is:
 1. A communication method, comprising: receiving,from a base station, a synchronization signal block using at least oneresource block; receiving, from the base station, information on areference point and information on one or more bandwidth parts (BWPs);determining a location of the reference point based on a location of theone resource block and the information on the reference point;determining an active BWP among the one or more BWPs; receiving, fromthe base station, information on a location of data in the active BWP;and obtaining the data based on the location of the reference point, theinformation on the one or more BWPs, and the information on the locationof the data in the active BWP.
 2. The communication method of claim 1,wherein the one or more BWPs exist in one component carrier (CC).
 3. Thecommunication method of claim 1, wherein each of the one or more BWPshas a location that is determined based on the reference point.
 4. Thecommunication method of claim 1, wherein the information on the one ormore BWPs includes an index of a starting physical resource block (PRB)for each BWP of the one or more BWPs and a number of PRBs within eachBWP of the one or more BWPs.
 5. The communication method of claim 4,wherein the index of the starting PRB for each BWP of the one or moreBWPs is based on a common PRB index, which is numbered from a lowestfrequency in the one CC.
 6. The communication method of claim 4, whereinwithin each BWP of the one or more BWPs, a BWP-specific PRB index isused.
 7. The communication method of claim 1, wherein the at least onePRB where the synchronization signal block is received is determinedbased on the information in the reference point.
 8. The communicationmethod of claim 1, wherein the information on the reference point andthe information on the one or more BWPs are received via a radioresource control (RRC) signal.
 9. The communication method of claim 1,wherein each of the at least one or more BWPs is determined based on thereference point and the index of the starting PRB for each BWP of theone or more BWPs.
 10. The communication method of claim 1, wherein theinformation on the reference point is used to determine a lowest PRB ofthe at least one PRB where the synchronization signal block is received.11. A communication device, comprising: a memory; and a processoroperably coupled to the memory, where the processor is configured to:cause the device to receive, from a base station, a synchronizationsignal (SS) block using at least one resource block; cause the device toreceive, from the base station, information on a reference point andinformation on one or more bandwidth parts (BWPs); determine a locationof the reference point based on a location of the one resource block andthe information on the reference point; determine an active BWP amongthe one or more BWPs; cause the device to receive, from the basestation, information on a location of data in the active BWP; and obtainthe data based on the location of the reference point, the informationon the one or more BWPs, and the information on the location of the datain the active BWP.
 12. The communication device of claim 11, wherein theone or more BWPs exist in one component carrier (CC).
 13. Thecommunication device of claim 11, wherein each of the one or more BWPshas a location that is determined based on the reference point.
 14. Thecommunication device of claim 11, wherein the information on the onemore BWPs includes an index of a starting physical resource block (PRB)for each BWP of the one or more BWPs and a number of PRBs within eachBWP of the one or more BWPs.
 15. The communication device of claim 14,wherein the index of the starting PRB for each BWP of the one or moreBWPs is based on a common PRB index, which is numbered from a lowestfrequency in the one CC.
 16. The communication device of claim 14,wherein within each BWP of the one or more BWPs, a BWP-specific PRBindex is used.
 17. The communication device of claim 11, wherein the atleast one PRB where the synchronization signal block is received isdetermined based on the information in the reference point.
 18. Thecommunication device of claim 11, wherein the information on thereference point and the information on the one or more BWPs are receivedvia a radio resource control (RRC) signal.
 19. The communication deviceof claim 11, wherein each of the at least one or more BWPs is determinedbased on the reference point and the index of the starting PRB for eachBWP of the one or more BWPs.
 20. The communication device of claim 11,wherein the information on the reference point is used to determine alowest PRB of the at least one PRB where the synchronization signalblock is received.
 21. A communication method, comprising: transmitting,to a user equipment (UE), a synchronization signal block using at leastone resource block; transmitting, to the UE, information on a referencepoint and information on one or more bandwidth parts (BWPs);transmitting, to the UE, information on a location of data in an activeBWP among the one or more BWPs; and transmitting, to the UE, the data,wherein: the information on a reference point indicates frequency offsetbetween the reference point and the at least one resource block, theinformation on one or more bandwidth parts (BWPs) indicates a locationof the active BWP in relation to the reference point.
 22. Thecommunication method of claim 21, wherein the one or more BWPs exist inone component carrier (CC).
 23. The communication method of claim 21,wherein each of the one or more BWPs has a location that is determinedbased on the reference point.
 24. The communication method of claim 21,wherein the information on the one or more BWPs includes an index of astarting physical resource block (PRB) for each BWP of the one or moreBWPs and a number of PRBs within each BWP of the one or more BWPs. 25.The communication method of claim 24, wherein the index of the startingPRB for each BWP of the one or more BWPs is based on a common PRB index,which is numbered from a lowest frequency in the one CC.
 26. Thecommunication method of claim 24, wherein within each BWP of the one ormore BWPs, a BWP-specific PRB index is used.
 27. The communicationmethod of claim 21, wherein the at least one PRB where thesynchronization signal block is received is determined based on theinformation in the reference point.
 28. The communication method ofclaim 21, wherein the information on the reference point and theinformation on the one or more BWPs are received via a radio resourcecontrol (RRC) signal.
 29. The communication method of claim 21, whereineach of the at least one or more BWPs is determined based on thereference point and the index of the starting PRB for each BWP of theone or more BWPs.
 30. The communication method of claim 21, wherein theinformation on the reference point is used to determine a lowest PRB ofthe at least one PRB where the synchronization signal block is received.31. A communication device, comprising: a memory; and a processoroperably coupled to the memory, wherein the processor is configured to:cause the device to transmit, to a user equipment (UE), asynchronization signal block using at least one resource block; causethe device to transmit, to the UE, information on a reference point andinformation on one or more bandwidth parts (BWPs); cause the device totransmit, to the UE, information on a location of data in an active BWPamong the one or more BWPs; and cause the device to transmit, to the UE,the data, wherein: the information on a reference point indicatesfrequency offset between the reference point and the at least oneresource block, the information on one or more bandwidth parts (BWPs)indicates a location of the active BWP in relation to the referencepoint.
 32. The communication device of claim 31, wherein the one or moreBWPs exist in one component carrier (CC).
 33. The communication deviceof claim 31, wherein each of the one or more BWPs has a location that isdetermined based on the reference point.
 34. The communication device ofclaim 31, wherein the information on the one or more BWPs includes anindex of a starting physical resource block (PRB) for each BWP of theone or more BWPs and a number of PRBs within each BWP of the one or moreBWPs.
 35. The communication device of claim 34, wherein the index of thestarting PRB for each BWP of the one or more BWPs is based on a commonPRB index, which is numbered from a lowest frequency in the one CC. 36.The communication device of claim 34, wherein within each BWP of the oneor more BWPs, a BWP-specific PRB index is used.
 37. The communicationdevice of claim 31, wherein the at least one PRB where thesynchronization signal block is received is determined based on theinformation in the reference point.
 38. The communication device ofclaim 31, wherein the information on the reference point and theinformation on the one or more BWPs are received via a radio resourcecontrol (RRC) signal.
 39. The communication device of claim 31, whereineach of the at least one or more BWPs is determined based on thereference point and the index of the starting PRB for each BWP of theone or more BWPs.
 40. The communication device of claim 31, wherein theinformation on the reference point is used to determine a lowest PRB ofthe at least one PRB where the synchronization signal block is received.